FOR 8 - MONTH PROTECTION AND TREATMENT OF FLEAS AND TICKS ON DOGS AT LEAST 7 WEEKS OF AGE. Allergy free Long lasting protection Safe and Eco- friendly Special water resistance design INSTRUCTION FOR USE: Put the collar around the Pet's neck, slip the end of the collar through the buckle and adjust for fit. Leave a room about 2-3 inches for pet growth and extra adjustment Buckle in place and cut off the excessive length Under normal condition, the collar should be replaced every8 months. Under condition of severe infestation, replace the collar more often Pet can wear the collar 24 hours per day while taking a bath or playing in the rain